Storage cart is perfect for keeping block sets of any size, even large ones, organized. Multiple 12" deep cubbies keep blocks easily accessible and make cleanup a snap when playtime is over. Birch cart is designed specifically for use with ECR4Kids blocks. Casters are included for mobility. Each of the top compartments measures 11-1/4" wide x 6-1/2" high. Each middle compartment size is 14-1/8" wide x 6-1/2" high. Each of the two bottom compartments measures 23" wide x 6-1/2". Storage cart is recommended for children ages 3 and up.